Blue-flame oil-burner.



R. HOFFMAN.

BLUE FLAME OIL BURNER. APPLICATION FILED MAY 26. |915.

1,1 92,1 99., 1 Patented July 1916.

' UNITED STATES PATENT OFFICE.

RUDOLPH HOFFMAN, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO SEARS,ROEBUCK AND COMPANY, F CHICAGO, ILLINOIS, A CORPORATION OE NEW YORK.

To all whom it may concer/n:

Be it known that I, RUDOLPH HOFFMAN',

a' citizen of theUnited States, residing at A right perforatedcombustion tubes are employed to produce a blue flame. Thetubes arerigidly secured together and rest loosely upon a burner vbowl containinga suitable wick. Surrounding the perforated tubes is a drum or chimney.When'the burner is to be lighted the combustion tubes and the drum mustbe tilted to permit access to the` wick. To support the drum and topermit of tilting the perforated tubes and the drum as a unit, itis'necessary that there be some connection between the'combustion tubesand the drum. It is, however, desirable that the drum be readilyremovable from the combustion tubes for convenience in cleaningor inreplacing any of the parts.

The object of this invention is to provide improved means whereby thecombustion tubes and the drum may be tilted as a unit althoughpermitting the drum to be freely and easily withdrawn when desired.

.In the, accompanying drawings, Figure 1 is a vertical centralsectionalview through a burner embodying the features of my invention. Fig.2 is atop plan view.

In the drawingsl and 2 indicate the inner` and outer perforatedcombustion tubes. Said tubes may be of any preferred construction andmay be rigidly secured together in any ordinary or desired manner.Herein I have shown two pins 3 extending through both of the combustiontubes at right angles to each other, said'pins serving to fasten` thetubes rigidly together. The combustion tubes 1 and 2 are adapted to besupported upon a burner bowl 4 which may be of any suitableconstruction. 'indicates the wick. l The drum or chimney 6 may be 0f anydesiredy form. Herein it is shown as being of Specification of LettersPatent.

Patented July 25, 1916.

' Application filed May 26, 1915. Serial No. 30,488.

generally frusto-conical shape, its lower larger end being provided withan annular inwardly-extending ange 7. The drum 6 is supportedconcentrically with the tubes 1 and 2 by means of a plurality ofbrackets 8 fixed to the outer tube 2 and projecting outwardly therefromto engage in an annulargroove 9 in the drum. In the present instancethree of these brackets are provided and are spaced equi-distant aroundthe tube 2, each bracket comprising a piece of sheet metal bent intoU-form and having its ends fixed to the outer side of the tube 2, theapex of the bend engaging in the groove 9. When it is desired todisassociate the drum fromY thetubes, the drum is forced upwardly out ofengagement with the brackets 8, the parts yielding to permit the apex ofeach bracket to be disengaged from the groove 9.

10. is a handle secured to the outer side of the drum and providingmeans for tilting the drumand the tubes, as indicated in Fig. 1, so asto give access to the wick for lighting the same.

I claim as my invention: l

An oil burner having, in combination, an inner and an outer combustiontube rigidly secured together, a drum surrounding said tubes and havingan interior annular groove, and a plurality of brackets spaced around Ythe periphery of the outer tube, each bracket formed of a strap membercomprising a U- shaped body portion and end portions bent at an angle tothe U-shaped body portion and rigidly xed in a vertical position to theouter side of the outer tube between the ends thereof, the middle bodyportion of each bracket being arranged toA project from the side of theouter tube and to frictionally engage in said groove in the drum, theengagement of said brackets and groove being capable of being broken byforcing the drum upwardly, whereby the latter may be disassociated fromthe combust-iontubes. Q

' In testimony whereof, I hereunto: set my hand in the presence oftwo'witnesses.

' RUDOLPH HOFFMAN.

In the presence of- FRED LUNDsIA,

E. H. SIEKMANN.

